This service repair manual covers the Yamaha 25BMH and 30HMH outboard motors. These models are engineered for reliability and performance, offering 25 HP and 30 HP respectively. This manual is designed to provide comprehensive information for maintaining and repairing these outboard motors, ensuring their continued optimal operation. The manual is presented in English, French, German, and Spanish and contains 446 pages of detailed instructions. It covers essential areas including general information, specifications, periodic checks and adjustments, fuel system, lower unit, bracket unit, electrical system, trouble analysis, and wiring diagrams. The step-by-step procedures for disassembly, repair, assembly, adjustment, and inspection are clearly outlined to assist owners, mechanics, and technicians in all service needs.